Stabilizing material introducing device



Sept. 5, 1944.

J. R. RUSHMER STABILIZING MATERIAL INTRODUCING DEVICE Filed Dec. 31, 1942 Patented Sept. 5, 1944 'STABILIZING MATERIAL m'monuomoaf John Robbins: Rushmery-Aniarillol- '1"ex. 1 1 Application Decembe r 31, 1942 Serial No; 470,891

,1 Claim.

'My invention relates to a device more especially adapted for the introduction of suitable liquid borne material into the ballast beneath railroad tracks; the device being intended for use with a method of pressure grouting whereby the grout or material is properly introduced into or beneath the previously laid ballast underneath the railroad tracks.

The invention has for its object t e provision of a device which may be readily inserted or driven into or through the ballast, with the upper end of the device preferably provided with a suitable driving head, While the lower end, at prearranged distances from the driving point, is provided with outlet or discharge openings arranged at a predetermined point relative to each other and preferably at a predetermined angle relative to the longitudinal axis. of the device; while the device adjacent the upper end is provided with an inlet or coupling for making connection with a suitable supply source of grout, slurry or other liquid borne earthy materials, including Portland or other cements and/or bitumen in one or more forms; the inlet or coupling and the discharge openings preferably having a definite relation with each other so as to determine the direction of discharge of the grout relative to the tracks.

The objects and advantages of my invention will be readily comprehendedfrom the detailed description of the accompanying drawing wherein:

Figure l is a cross-sectional elevation of a railroad track with a pair of my improved devices shown in grout introducing position.

Figure 2 is a longitudinal sectional View of my improved device with an intermediate portion broken away.

Figure 3 is a cross-sectional view taken on the line 3-4 of Figure 2 looking in the direction of the arrows.

My device is intended for the injection or introduction of a suitable solidifying material into the sub-soil of a structure, being more especially intended for the introduction of grout or other liquid borne and quick setting material into the base of the ballast and into the voids or pockets beneath the ties of railroad tracks, in order that proper solidification or stabilization of a railway roadbed may be obtained.

The specific exemplification of the invention illustrated in the drawing consists of a suitable metal tubing [0, preferably seamless steel of proper diameter, and of variable length, provided adjacent its lower end with a pai of outlet openings as at I I ll, arranged at opposite sides of the longitudinal axis ofjthe tubing and in staggered relation or at different distances from the lower end orthe tubing, as shown in' Figure 2. The outlet'op'enings II, II, as shown in Figure 2, are preferably arranged at an inclination relative to the longitudinal axis'of the tubing, sloping inwardly toward the lower pointed end of the tubing in such manner that foreign material,

suchfas'balla-st, rocks, etc will havev a tendency to roll away fromthe holes, rather than into the tubing when the pointed end is driven into the ballast, and thusensure a freer outward flow or discharge of the solidifying or stabilizing material. In order that the tubing may be readily driven into or through the ballast, indicated at steel block welded to the tubing ID by the fillet l6; while the upper end of the block preferably is faced with a hard welding rod, as at I1, to prevent deformation of the block by hammer blows in the driving operation. One side of the driving head l5 and of the inserted upper end of the tubing (0 are bored at a downward inclination as at l8, Figure 2, and the driving head coincident with the bore I8 is provided with a pipe coupling l9, preferably arranged at the same inclination as the bore 18; the interior of the pipe coupling being shown threaded to receive a conduit or hose leading from a source of stabilizing material which preferably is under a certain degree of pressure.

The inlet coupling 19 is shown welded, at 20, to the tubing l0; and the coupling I9 is preferably arranged on the same side of the device as one of the outlet or discharge openings ll, beingin the same longitudinal plane, thus enabling the operator to determine the directional position of the outlets II and direction of discharge of the grout or liquid borne material.

Railway roadbeds beneath the ballast I2 frequently develop voids or pockets, as indicated at 2| in Figure 1, and when these voids or pockets develop beneath the rail supporting members or ties 22, the latter become depressed by the weight With my improved'devi ce, this may be readily accomplished by forcing or driving the pointed end 13 of the device through the ballast and into the void or pocketthe length -(which may be variable) of the device enabling the lower ported n portion to extend into the voids in the sub-structure so as to discharge the quick setting material (which is preferably under pressure) into the pockets or voids, while the upper end of the device is disposed above the ballast to permit con nection to be made between a suitable source of stabilizing material and the inlet coupling I9, as illustrated inv Figure 1, where a pair of the devices are shown, at opposite Sides of the track, driven into the cavities or' voids 2| beneath the normal plane of the ballast l 2. i

The invention has been described as especially applicable for use in thestabilization of the ballast of railway tracks, but it is apparent that the I device is equally well adapted for use in stabilizing and solidifying other types of sub-structures;

the specific eiremplification of the invention being believed to be the best embodiment which has been described in terms employed for purposes of description and not as terms of limitation as structural modifications may be possible without, however, departing from the spirit of my invention as defined in the appended claim.

What I claim is:

A device of the character described comprising a steel tubing provided in its side adjacent its upper end with an inwardly sloping inlet opening and adjacent its lower end and on opposite sides of its longitudinal axis with straight rearwardly sloping outlet openings arranged in staggered relation, with one of said outlet openings arranged on the same side of the tubing as said inlet open- I ing; a pointed steel insert arranged in and clos- JOHN ROBBINS RUSHMER. 

